63532728 has 64 divisors (see below), whose sum is σ = 201696000. Its totient is φ = 18151776.

The previous prime is 63532727. The next prime is 63532741. The reversal of 63532728 is 82723536.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 63532692 and 63532701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63532727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19498 + ... + 22521.

It is an arithmetic number, because the mean of its divisors is an integer number (3151500).

Almost surely, 2^63532728 is an apocalyptic number.

It is an amenable number.

63532728 is an abundant number, since it is smaller than the sum of its proper divisors (138163272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63532728 is a wasteful number, since it uses less digits than its factorization.

63532728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42041 (or 42031 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 63532728 is about 7970.7419980827. The cubic root of 63532728 is about 399.0241378353.

The spelling of 63532728 in words is "sixty-three million, five hundred thirty-two thousand, seven hundred twenty-eight".